OMAPL138如何在Linux下使用EDMA3驱动

yyj

- v0 j3 M: Q4 j$ v4 n

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   % l7 S# |9 _0 u9 {
6. *
   ; v: P3 ^9 [) g* i  x6 C' h
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    + h- j2 f0 Z7 J* ?) i
12. *
    * U! \6 V0 _2 I2 b. ]. ]9 q  Y
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    0 o% A! g; m8 i+ e
15. * This program is free software; you can redistribute it and/or
    0 r' j! U% U/ g0 t& T- y
16. * modify it under the terms of the GNU General Public License as
    6 j* v2 u, p: x, D  |  x' K; D( m
17. * published by the Free Software Foundation version 2.
    
18. *
    1 o" S- l! ^4 f- E+ A% c5 H+ y
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    5 s; ?+ u: z4 w# R) V4 O: |
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
      @9 O/ Z. ^1 z+ g  _. R) Q
24. 
    
25. #include <linux/module.h>
    6 }2 W8 D1 q) L) N6 O% a
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ; ]. i, N! L9 j
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ' w1 q; \6 i# h1 c; @& S7 v5 {( c
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ; T! ?6 A" C" a8 X
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ' |8 v$ B0 y7 H
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    1 s8 H; G  L  f8 ~
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    4 @* N; Q$ R+ a9 k3 i
39. #include <asm/hardware/edma.h>
    * T- Y* d0 T; X
40. 
    4 ~1 [" f' L" g8 G( {: \/ O
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ; w1 l4 g. v* W" v
43. 
    
44. #ifdef EDMA3_DEBUG
    3 B' E* W1 q" O# P$ n! V
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    8 j0 t* B7 y; p& R- W9 M9 R
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    8 b. h# g+ u% S
48. #else
    1 E. c3 n& @4 t! B! C
49. #define DMA_PRINTK( x... )
    9 u7 I1 w7 [* w5 A. h* c& N) m) Z
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    " Q0 c  d5 t* v( W# F8 ]9 y
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    - M  b" Y' k8 `5 M/ b! z/ _4 `
56. #define TCINTEN_SHIFT               20
    + H! Y2 c+ D) b: a
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( ~8 j2 i: \) Q
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 K% i$ p) o- t) y3 v$ y, \. c( L
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! H9 X- Z( H7 }& `5 ]" l# a
67. 
    & d8 ?: t; t2 h- _* V9 d
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ! K8 U8 A) u/ g8 D/ F0 m5 P4 Z
70. dma_addr_t dmaphysdest1 = 0;
    1 h+ {' K" P1 W: o; R* d
71. dma_addr_t dmaphysdest2 = 0;
    . a+ q$ T4 H. e) W; q- V# O, }
72. 
    : ?/ d( y+ m& z+ W' n
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    9 c* f  L8 A) U6 r! ]
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    - h% N6 s2 l1 e7 P( B, t( r
80. static int ccnt = 8;
    + E5 Q) w8 j$ V# B+ x/ p; N' F
81. 
    2 X4 |! ^# B( ]: {; o+ M7 y
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    8 Q+ B! I8 l9 @, _7 u7 S/ K
84. module_param(ccnt, int, S_IRUGO);

复制代码

& g, D! x" k6 h5 R0 |; [+ O0 i
      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
- y& u- I. m& e. parm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


, K. V- x+ @% a  [